US11759336B2 - Prosthetic foot - Google Patents

Prosthetic foot Download PDF

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Publication number
US11759336B2
US11759336B2 US17/057,944 US201917057944A US11759336B2 US 11759336 B2 US11759336 B2 US 11759336B2 US 201917057944 A US201917057944 A US 201917057944A US 11759336 B2 US11759336 B2 US 11759336B2
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US
United States
Prior art keywords
prosthetic foot
foot according
keel
spacer
ankle
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US17/057,944
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English (en)
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US20210298924A1 (en
Inventor
Grégory Huot
Mathieu Janier
Rajasundar Chandran
Mathieu Falbriard
Thierry Patrick Barras
Michael Rechsteiner
Marc Zlot
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Comite International de la Croix Rouge Cicr
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Comite International de la Croix Rouge Cicr
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Assigned to COMITÉ INTERNATIONAL DE LA CROIX-ROUGE (CICR) reassignment COMITÉ INTERNATIONAL DE LA CROIX-ROUGE (CICR) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZLOT, Marc, BARRAS, Thierry Patrick, CHANDRAN, Rajasundar, FALBRIARD, Mathieu, HUOT, Grégory, JANIER, Mathieu, RECHSTEINER, Michael
Publication of US20210298924A1 publication Critical patent/US20210298924A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2/6607—Ankle joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2002/6614—Feet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2002/6614—Feet
    • A61F2002/6657—Feet having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2002/6614—Feet
    • A61F2002/6657—Feet having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel
    • A61F2002/6664—Dual structures made of two connected cantilevered leaf springs

Definitions

  • the invention relates to a prosthetic foot comprising a keel embedded in a material, e.g. a foam.
  • the object of the present invention is to provide a prosthetic foot having improved biomechanical properties.
  • the prosthetic foot according to the invention is defined in the claims.
  • said encapsulation material may advantageously comprise an internal foam that at least partially encapsulates the keel and an external foam that encapsulates the internal foam, the external foam having a higher density than the internal foam density.
  • the prosthetic foot according to the invention provides biomechanics that is very similar to the one of a sound human foot (plantar flexion, dorsiflexion, inversion, eversion).
  • the materials and design used for the keel allow storing and releasing strain energy at the right phases of the gait cycle.
  • the encapsulation material acts as a safety feature to prevent keel overloading and as cosmetic feature as it has a human foot shape.
  • the LFT composite preferably comprises 15% to 70% volume fraction of fibres with a length ranging from 1 mm to 15 mm.
  • the elastic blade may advantageously be made of a composite that comprises 40% to 65% volume fraction of fibres which are typically longer than 50 mm.
  • At least an important part of the ankle element is encapsulated in low density foam (typically ⁇ 0.7 g/cm 3 ), said foam being overmoulded by injection moulding, casted or glued using an adhesive.
  • low density foam typically ⁇ 0.7 g/cm 3
  • the prosthetic foot includes an overload protection system to prevent damage of the prosthetic foot in case of severe loading during use.
  • the overload protection system includes at least one spacer, preferably made of an elastomeric material, that is arranged between two overlapping parts of the keel 1 .
  • the prosthetic foot is designed in a way it can be bolted to a prosthetic leg from the sole surface and through its whole internal structure like most SACH (Solid Ankle Cushion Heel) feet available on the market.
  • SACH Solid Ankle Cushion Heel
  • FIG. 1 shows a keel according to the invention
  • FIG. 2 shows a complete prosthetic foot (cross-sectional view) that includes the keel of FIG. 1 .
  • the keel 1 (see both figures) is essentially made of two elements, namely:
  • the keel 1 is embedded in an encapsulation material 2 and both objects 1 , 2 being contained within a shell 15 having the shape of a normal foot.
  • the ankle 3 has roughly a horizontal U-shape with an upper branch 5 and a longer lower branch 6 .
  • the upper branch 5 has a vertical extension 11 that forms a part of an overload protection system that will be described below.
  • the free end 9 of the lower branch 6 is fixed to the blade central area 10 .
  • fixation any other suitable fixation means may be used.
  • the foot prosthesis by combination of the elastic ankle 3 and elastic blade 4 , features biomechanical movements (plantar, dorsiflexion, inversion, eversion) and heel shock absorption thanks to their elastic behaviour and a longitudinal slit in the two parts.
  • ankle 3 and 4 are slotted, i.e. they contain a longitudinal slot.
  • slots increase the flexibility of the objects.
  • the invention is of course not limited to such a configuration. Slots are not mandatory. Any other way to increase the flexibility could also be used.
  • the foot prosthesis features energy storage and release (a.k.a. ESAR in the prosthetics jargon) with an efficiency above 85%, said energy storage and release taking part in similar proportions in both parts.
  • the ankle 3 and heel 12 areas may include overload protection systems to prevent damage of the prosthetic foot in case of severe loading during use, the overload protection systems being based on a blocking mechanism during plantar and dorsiflexion, the blocking mechanism using a spacer, made e.g. of an elastomeric foam (thermoset or thermoplastic) with a specific and controlled compaction point.
  • the spacer may be made from the same material as the encapsulation material 2 . In this latter case, the spacer material has a higher density than the density of the surrounding encapsulation material.
  • the spacers are preferably in an area 13 that is located between the vertical extension 11 and the blade central area 10 or in an area 14 that is located between the ankle 3 rear part and the blade 4 .
  • the low-density foam is encapsulated in a high-density polymer foam (typically >0.7 g/cm 3 ), the foam being thermoset or thermoplastic and is used as an external shell to protect internal parts.
  • This external shell has the proportions and aspect of a human foot (with or without a split between the big toe and others).
  • Typical Shore hardness of used foams ranges from 35 Shore A to 70 Shore A.

Landscapes

  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
US17/057,944 2018-07-10 2019-07-08 Prosthetic foot Active 2039-07-29 US11759336B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
WOPCT/IB2018/055071 2018-07-10
IBPCT/IB2018/055071 2018-07-10
IB2018055071 2018-07-10
PCT/IB2019/055785 WO2020012319A1 (en) 2018-07-10 2019-07-08 Prosthetic foot

Publications (2)

Publication Number Publication Date
US20210298924A1 US20210298924A1 (en) 2021-09-30
US11759336B2 true US11759336B2 (en) 2023-09-19

Family

ID=67544286

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/057,944 Active 2039-07-29 US11759336B2 (en) 2018-07-10 2019-07-08 Prosthetic foot

Country Status (5)

Country Link
US (1) US11759336B2 (de)
EP (1) EP3820409B1 (de)
CN (1) CN112351752B (de)
MX (1) MX2020013678A (de)
WO (1) WO2020012319A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4380507A1 (de) * 2021-08-02 2024-06-12 Verein Project Circleg Fussprothese, insbesondere beinprothese

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645509A (en) 1984-06-11 1987-02-24 Model & Instrument Development Corporation Prosthetic foot having a cantilever spring keel
US4652266A (en) 1986-03-07 1987-03-24 Kingsley Mfg. Co. Molded elastomeric prosthetic foot having energy-storing articulated keel
US5037444A (en) * 1989-01-05 1991-08-06 Phillips L Van Prosthetic foot
US5116385A (en) 1991-05-06 1992-05-26 Universite De Montreal Medio-lateral control enhancing, cantilever-spring type prosthetic foot
US5156632A (en) 1990-11-29 1992-10-20 Otto Bock Orthopaedische Industrie Besitz- und Verwaltungs-Kommanditgesel lschaft Jointless prosthetic foot
CA2103341A1 (en) 1993-10-14 1995-04-15 Reinhold Schneider-Nieskens Ankle joint spring element for artificial legs and artificial foot
US5976191A (en) * 1989-04-13 1999-11-02 Phillips; Van L. Foot prosthesis having curved forefoot
US6197066B1 (en) * 1999-07-06 2001-03-06 Robert Maurice Gabourie Prosthetic foot providing plantar flexion and controlled dorsiflexion
US6743260B2 (en) 2000-12-22 2004-06-01 Barry W. Townsend Prosthetic foot
US20060229736A1 (en) 2000-06-30 2006-10-12 Christensen Roland J Prosthetic foot with energy transfer
US20100023135A1 (en) 2008-07-25 2010-01-28 Rubie Eric W High-Performance Multi-Component Prosthetic Foot
US7771488B2 (en) * 2006-07-03 2010-08-10 Ossur Hf Prosthetic foot
US20120303135A1 (en) * 2011-05-26 2012-11-29 Ha Van Vo Prosthetic Devices and Methods of Making and Using the Same
US20170049584A1 (en) * 2014-05-07 2017-02-23 Otto Bock Healthcare Gmbh Prosthetic foot

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444883A1 (de) * 1990-02-28 1991-09-04 CHAS. A. BLATCHFORD & SONS LIMITED Kunstfuss
CN2160361Y (zh) * 1993-05-12 1994-04-06 廖金声 带有复合材料龙骨的储能假脚
DE29707416U1 (de) * 1997-04-24 1998-08-27 Otto Bock Orthopädische Industrie Besitz- und Verwaltungs-Kommanditgesellschaft, 37115 Duderstadt Federelastischer Fußeinsatz
US7410503B2 (en) * 2001-03-30 2008-08-12 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US7611543B2 (en) * 2001-03-30 2009-11-03 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
DE102014006687A1 (de) * 2014-05-09 2015-11-12 Otto Bock Healthcare Gmbh Prothesenfuß

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645509A (en) 1984-06-11 1987-02-24 Model & Instrument Development Corporation Prosthetic foot having a cantilever spring keel
US4652266A (en) 1986-03-07 1987-03-24 Kingsley Mfg. Co. Molded elastomeric prosthetic foot having energy-storing articulated keel
US5037444A (en) * 1989-01-05 1991-08-06 Phillips L Van Prosthetic foot
US5976191A (en) * 1989-04-13 1999-11-02 Phillips; Van L. Foot prosthesis having curved forefoot
US5156632A (en) 1990-11-29 1992-10-20 Otto Bock Orthopaedische Industrie Besitz- und Verwaltungs-Kommanditgesel lschaft Jointless prosthetic foot
US5116385A (en) 1991-05-06 1992-05-26 Universite De Montreal Medio-lateral control enhancing, cantilever-spring type prosthetic foot
CA2103341A1 (en) 1993-10-14 1995-04-15 Reinhold Schneider-Nieskens Ankle joint spring element for artificial legs and artificial foot
EP0648479A1 (de) 1993-10-14 1995-04-19 IPOS GMBH & CO. KG. Sprunggelenkfederelement für Beinprothesen und Kunstfuss
US6197066B1 (en) * 1999-07-06 2001-03-06 Robert Maurice Gabourie Prosthetic foot providing plantar flexion and controlled dorsiflexion
US20060229736A1 (en) 2000-06-30 2006-10-12 Christensen Roland J Prosthetic foot with energy transfer
US6743260B2 (en) 2000-12-22 2004-06-01 Barry W. Townsend Prosthetic foot
US7771488B2 (en) * 2006-07-03 2010-08-10 Ossur Hf Prosthetic foot
US20100023135A1 (en) 2008-07-25 2010-01-28 Rubie Eric W High-Performance Multi-Component Prosthetic Foot
US9011554B2 (en) * 2008-07-25 2015-04-21 Fillauer Composites Llc High-performance multi-component prosthetic foot
US20120303135A1 (en) * 2011-05-26 2012-11-29 Ha Van Vo Prosthetic Devices and Methods of Making and Using the Same
US20170049584A1 (en) * 2014-05-07 2017-02-23 Otto Bock Healthcare Gmbh Prosthetic foot

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Amputee Coalition, Prosthetic Feet Fact Sheet Updated (Jun. 2018). *
B.L Kalasson, Carbon fibre and fibre lamination in prosthetics and orthotics: some basic theory and practical advice for the practitioner, (1995). *
International Search Report for PCT/IB2019/055785 dated Nov. 6, 2019, 5 pages.
Written Opinion of the ISA for PCT/IB2019/055785 dated Nov. 6, 2019, 6 pages.

Also Published As

Publication number Publication date
EP3820409A1 (de) 2021-05-19
BR112020023219A2 (pt) 2021-02-23
EP3820409B1 (de) 2023-10-18
MX2020013678A (es) 2021-03-25
US20210298924A1 (en) 2021-09-30
WO2020012319A1 (en) 2020-01-16
CN112351752B (zh) 2024-07-09
EP3820409C0 (de) 2023-10-18
CN112351752A (zh) 2021-02-09

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